Gas-engine



3 SheetsSheet 1. P. C. OLIN. GAS ENGINE.

No Maciel.)

No.Y 569,386A

Patentedoo'c, 13, 1906' (No Model.) N 3 Sheets-Sheet 2.

C'. OLIN.

GAS ENGINE.

' No. 569,386. Patented-Det. 13, 1896.

lllllllfv 3 Sheets-.Sheet 3. P. C. OLIN. GAS ENGINE.

(Nrv'Model.)

No. 569.386. Patented Oct. 13, 1896.

Unirse STATES FRED C. OLIN', OF BUFFALO, NEW YORK.y

ef-issnelnE.

SPECIFICATION forming part of Letters Patent No. 559,386, dated October1.898. Application filed February 11,1893. Renewed March 131896. SerialNo. 583,134 (No modald To all whom it may concern:

lle it known that I, FRED C. OLIX, of luffalo, in the County of Erie andStute of New York, have invented certain new and useful Improvements inGas-Engines; and Ido hereb'ydeelzue the following to be n. full,elenr,und exnet description ot' the invention, sueh as will enable othersskilled in the art to which it pertains to mnke and use the snlne'.

My invention relates to improvements in gas-engines, and more especiallyto that elnss of gnsengines wherein the expansive force of the gasnetsvdireetly upon the piston und through the piston upon the othermoving,r parts, und wherein ges is introduced at one induction-port andatmospheric nir :it nnother induction-port to eommingle with the gos,und wherein the mixed fluids are ignited or exploded by an electricspark, the result zo ine' combustion or dilntntion-of the gasesfurnishinf;r the desired motive power.

My invention consists especially in the menus employed for producingtheeleetrie spnrk io explode the gnses; in the means employed forgoverning the speed of the engine; in the means employed for operntingthe eduetion-vnlve, and in the means employed for lubricating theconnection of the pistonrod with the piston and engine-shaft.

My invention also consists in certain fenv tures of construction und incombination of parts' hereinafter' described, and pointed out in theelnims, the object being;l to produce an engine that is not ouly'moreeconomical und simple in ,eoustruetion, but that is more re- 'linble,durable, and etlieient than the engines heretofore devised.

In the neeompanying drawings, Figure 1 is n. central vertical seetion ofan engine embodying my invention. imud side elevation relative to Fie.l. Fun is is nn enlarged Central vertical section of a x)ortion of themeans employed for igniting the gases and of the valve mechanism for(nntrolling the supply of nir nudgns to the engine. Fig. el is :i sideele 'zrtionof n poriioi. of the menus employed for opening the eduetion-'n.lv'e.

Referring to the drawings, A represents the upright hollow cylinder thatis closed at its lupper end by meansof :i cap A', bolted to snjil end of1ho eylinder. 'llm'eylinder is Fig. E. is a Yrig-hte.

open nt its lower end. The cylinder ,ineketed, ns nt- Ai", the nnnuln-rchamber Ztl, be tween the jacket and eus-ingr' ot the cylinder, beingiilled with waiter for the port-ose el" mnintnining the eyliinler in ueompnrntirelg.' eool condition, the ports or duets for suppl y ing' thejneketnnd draining the suine being' shown in dotted lines nt Ai A,respectively', Fig. l. 'lhe jacketis prefernbly enst integral with thecylinder, nud snid .casting ni. its lower end below the cylinderterminates in legs AT, securely bolted, as :1t A", to thesupporting-buse il of the engine,

(l represents the piston ihnt is ndnped to reciprocate eudwise oi.'chamber A? of the eylindex', the piston-rod if being :suiil'nbly neeuredto the pistou und heilig.; operatively eonneeied, in any suitablemanner, with the ern-nk d oi the main or drivingy shaftl of the engine ihe piston is kept luhrieni'ed in :my

suitable munner, butprelernblu hy menus ot' an oil-cup E, loentedoutside. ol' the uinelzet and cylinder und communienting, by menus of :Lpipe l, with the lower pori ion oi the ohunber of thouylinder. 'lhepiston is prelfernblyol' the trunk vnrieivv, und the external peripheryof `the trunk is provided nt suitable intervals with eireumierentinlgrooves or recesses Ui, adnpied to receive und distribute the lubricant,thereby keepin'g the piston :it nll times und nl, all ports amplylubriented. v

The pistoirrod is eonneeled with the trunk of the piston preferably nsshown in Fig. l', wherein the upper end oi' snid rod terminntes in aneye or sleeve ti, thnt easily embraces around transverse pin or memberC4, suitably supported within the trunk ot'` fthe piston, member C*beingv eentrnlly und longitudinally perforated, as ntfs, 'for thereception of lubricant from the exteriorot' the piston. Passage-wey Ci",by means of n lnterni oriiee or perforation C in member Ci, communicateswith the bearing nt the upperend of the pis ton-rod, thereby keeping'Suid. hearing weil lubricated. Some of the lubrienntfed to seid bearingwill, however, find :unexitnt the engl of eye or sleeve Gioi.' thepistou-rod und trie-kie or iow down snid rod. i suitable menus forcatching or receiving the vlubricant that thus triekles or iows down thepistou-rod, and utilize said lubricant furthe therefore provide f shaft.

is applied.

lubrication of the connection of the pistonrod with the crank of theengineshaft. A. preferable construction is shown -in Fig. l,

wherein the lower end of the piston-rod ter- 'minates in a sleeve CT,that easily embraces the' central or horizontal portion of the crank ofthe engine-shaft. Sleeve lCT at the top is provided with an externalannular shoulder C8, that supports an upright cup or receptacle G, throngh which the piston-rod extends. Said cup or receptacle is in openrelation, by means of one or more passage-waits C9, with the bearing ofsleeve C?, and hence by the construction just described it will beobserved that any lubricant trickling or flowing down the pistonfrod iscaught by cnp 'or receptacle G and is thence fed through passage way orways C9 .to the bearing of theconnection of theipistomrod with the crankof theengine- I would here remark that I reserve the-m atter disclosedin the preceding paragraph for the subject-matter oi' a separateapplication for Letters'latent. y

Engine-shaftfhas suitable bearing in the snpportirig-baseof the machineand is lubricated in any suitable manner, but prderably, as shown inFig. l, from oilcups H, suitably supportedandprovided' .one at yeitherend of crank d; Theengine-shaft is preferably pro-4 `vided vwith twoily-wheels l and J, one at each end of the shaft, said ily-wheels beingoperatively mounted upon the shaft in any suitable ,mannerand the oneily-wheel l being provided with the pulley I', by which the motive powerReferring next' to the means employed for supplying air and gas io thecylinder and for governing the speed of the engine, the cylinder andinclosing jacket at one 'side andat its upper end is laterally enlarged,as at a, and is provided with a lateral duct a', that extends throughsaid lateral enlargement of the casing 'andis closed at its outer end,as will hereinafter appear. Casing a. is provided with a vertical orupright chamber a2, that l is in openfrelation with the air-inductionport or opening a. (Shown more clearly in Fig. 3.) Chamber (121s adaptedto communicate with duct a', and the casing of said chamber at its upperend is provided with a seat a* for a'l lower end with a chamber a incasing a, and

chamber a6 is in open relation with the gasiuduction port or opening ai.It will thus be observed that Valve L is adapted to open and closecommunication between gas-receiving ceases A chamber m and chamber c andthat; the air and gas commingle in said lastfmentioned'` chamber. Thestem L of Valve L extends downwardly through 'gas-rcceiving ,chamber rm,and is preferably made in three sections, as will hereinafter more fullyappear, the up per section ofthe stemI 1 being tubular, as shown,screw-threaded internally at its lower end, as at l', and screwed ontothe correspondingly externally-threaded upper end ofthe section ofvalve-stem next'fbelow, and also preferably secured thereto' by lmeansof a screw Z2. The stem of valve K extends downwardly centrally throughchamber L? in the upper section ot the steinof the valve L andterminates in the lower portion of said charm ber. The lower'end ofvalvesteinl' isy ex ternally screwthreaded and has mounted thereon a nutK2, between which andA the to wall of chamber L2 is located acoil-springK conned upon the valve-stein. Spring Ksacts their properrelative position.y N represents cated preferably as shown, next belowvalve K. The stem of valve K is provided with external annular shouldersK4 K5, the one shoulder, Ki, abutting the underside of guide N, and theother shoulder, K5, resting upon the top of valve L when valve K isclosed By the construction hcreiubefore described f it will be observedthat the aetnationof valve L will necessarily accompany the actuation ofvalve K, except when vulve L is mechanica-ily held to its scat, as willhereinafter appear. Guide Nis'preferablyof the construction shown, thesanxecomprising an annular rim n, resting upon shoulder K4.of the Stemof valve K, and arms n', declining v,downnected at their lower and outerend bya rim n2, that engages the surrounding wall of chamber a2. Bymeans otI this'const-ruction it ise obvious that the upwardcurrentsofair and gas, upon opening valine aridi', will strike arms 'n' of saidguide" nd'be thereby directed in dinerent directions, resulting in amore thoroughly commingling of the air and gas. l

The central member of valve-stem, L'a thatis rigidly secured to theupper tubular ,heinber of said stein at itslower end, termihates,preferably, in a downwardlymapering externally-screwthreaded hollowportion l, slitted longitudinally, as' at l", and haring clamps lportionZ5 upon the upper end of the lower section '3 of the valve-stem, section3 extending into section 2, as shown. The lower section 3 (see Fig. 1)of saidvalvestem extends downwardly, along the side of the engine into acorresponding hole d' in the adjacentfnox or bearing D of theenginesha'ft.

Referring now tothe eduction side of the engine,(see Fig. 1,) thecylinder opposite to the locationnf the air and es induction Valvecasipg is laterally enlarged ,as at as, and proin the directionto retainvalves K'and Lin a guide for Valve-stem K, said guide being loy wnrdlyand outwardly from said-rim and-con IIO mounted thereon 'a nut Z5, thatsecurely Y vided with a lateral duct or passageway a",

that is in open relation with the chamber of the cylinder and is adaptedto communicate with an upright chamber am within casing a, said chamberal being in open relation with eduction port or pipe a. Casing as, atthe upper end of chamber al, is provided with a sesta12 for a valve' O,that is adapted to open and close communicationy between duct orpassage-way a and chamber al". The valvestem O' of valve O extendsdownwardly through chamber al and through a correspending perforation ain casing a. Upon valve-stem 0', ing as, is rigidly mounted a collarObetween which and the adjacent end of casing aS the valve-stem hasconfined upon it a coilfspring O3, that acts in the direction to retainvalve O in its seat. Valve-stem O at its lower end extends looselythrough a guide'O, rigid with the adjacent supporting leg or member ofthe cylinder, and above said guide has slidablymounted thereon asleeveO, to which is pivotally secured, as at O, the arm of eccentric-strapp', that embraces eccentric p, rigid 'and preferably integral, as shown,with a spur-'gear P, thatv is pivoted, as at l, to any suitable support,such, for instance, as

' a transverse member or brace A0 of supportable material, embraces theing legs or members A7, and meshes with a pinion D2, operatively mountedupon the engine-shaft.

By the construction just described it will be observed that sleeve O5 iselevated during each rotationy of eccentric p against rigid collar O2,thereby and thereupon elevating the valve-stem and lifiing valve O offits seat. A cushion Q, of leather, rubber, or any suitvalve-stem belowcollarO?, so that no appreciable noise is occasioned by the vactuationof sleeve O5 against said collar.

A cycle of the engine involves four complete strokes -of the piston.'yThe piston being at the extreme of its upstroke at the comL mencementof acycle, (bqthind'uction-valves andeduetion-valve being closed,) uponthe succeeding down or drawing stroke of the pistonapartial or practicalvacuum is created iii/the cylinder above the piston, creating ai suction"that will lift the inductionvalves K and L off their seats and causethe mixed air and gas tor'iioiv into the cylinder, (the eductionfvalve 0being meanwhile held to its scat by spring O3.) The next succeedingupstroke ofv the piston (second pistonstroke in the cycle) will compressthe mixed charge above the piston, whereupon by an electric spark,produced as hereinafter described, the mixed air a gases are ignited,resulting in the combustion or dilatation of the gases and in anexpansive force directly upon the piston. Just at the time the pistoncommences the second upstroke or fourth stroke of the cycle, upon thecompletion of the second downward stroke or third stroke a suitabledistance below cas of the cycle that immediately fellows the explosionof the charge, eduetion-valve O, by tbc mechanism hereinbefore describedand operatively connected with the engineshait, 7o A is opened, sothatthe exploded or dilated gases are discharged during-the fourth or'lastpiston-stroke of the cycle, the mechanism for opening the eduction-valvebeing so timed that it will time. I

The eductionvalve being required to open but once with every otherrotation of the engine-shaft, it follows that the diameter of gearP ofsaid eduetion-valve-actuating mech- 8o anism is twice that of thedriving-pinion.

The simplicity and elficiency of the mechanism employed for opening theeduet-ionvalve is quite apparent.

The speed of the engine is controlled or governed by partially orentirely cutting oif the supply of gas.r Valve L, that opens and closescommunicationbetween gas-receiving chamber m and air receiving andmixing chamber a2, is adapted to be held losed or 9o partially closedagainst any suction `created in the surrounding chamber by mechanismoperatively connected with the engine-shaft. A preferable constructionof said governing mechanism comprises an eccentric R, (see- Figs. l and2,) loosely mounted upon the hub of fiy-wheel J. Said eccentric isprovided with a laterally-extendin g arm R', pivoted at its outer end,as at R2, to one of the spokes or arms ot' the y-whe'el, preferablydiametico rically opposite` arm R'. Said eccentric has alaterally-extending arm R, to which is attached a spring R5, the otherend whereof is attached to one of the arms of the ily-wheel.

Said spring acts in the direction to retain the 1o 5 eccentric in itsnormal position, the eccentric -havinga laterally-extending weighted armR rigid therewith. An eccentric-strap r embraces eccentric R and has anupwardly-extending arm r', pivotally secured at its end to a collar L3,lslidably mounted on section 3 of valve-stem L', a stiff coil-spring L4.being."

confined upon said section of the valve-stem between collar L? and anyrigid member of the stem below, such, for instance, as ailever 1 i 5 L5,rigidly mounted on tliedower end of section 3 of the stem. Thearrangement of parts is such that when the speed of the engineshaftbecomes too great orabnormal,

Weighted arm R, by means of the centrifugal 12e force developed in theweight of said arm,

'will be moved -to shift the eccentric in the direction to movejarm r'of the eccentric-strap A to depress or hold sliding collar L3, actingupon y spring L", that in turn acts upon the stem'of 125 valve L,causing said valve to be held closed or partially closed,notwithstanding any suction created in the chamber surrounding thevalve, thereby reducing or cutting oi the supply of gas until theengineshaft has again 13o attained itsnormal speed, when'the parts willautomatically return to their normal position,

performits function at the proper 75 outer. u o

'valve K.

and valve L will bo released subject to the action of the suctionintermittently created in the chamber siii-rounding the vulve.

- Referring lastly tol the .means employed the normal position of thesame, rests and bears upon the. inner end-of a wireor rod T, thatextends centrally through a screw tinto duct c. Screw extends centrallythrough a sleeve or annular plu i', that is scrcived into theIcorrespondingly-thrcaded outer end, of duet or passage-way a'. Theexternal diameter of sleeve t is such, relative to the dialneter ofscrew f, as to form an annular chamber t2 between said members.Seremi/is securelyA held in place by means of a disk ofinsulatingmaterial i, interposed between the inner end of sleeve i andthe head of screu` and by means of a diskfl of insulating materialabutting annular shoulder t5, formed by the annular head i, in whichtheouter end of said sleeve terminates. insulating-disk t5 nicely .fitsthe interna-l periphery of said head and is securely held iu placeagainst shoulder t" by means lof a nut i?, screwed onto the shank ofscreuj l, nut I being of such size that when secured in place it shallnot `make Contact with thc head of sleeve or plug t', but shall besuificicntly separated from the same to be `electrically insulatedtherefrom. )Vire or rod 'lf extends centrally through said nut,and inorder that said wire or member shall be rigidly held in place it-ispreferably screwt-hreaded Where it. extends through the nut, as at 'l",and engages a correspondingly.` threaded perforation in said nut. 'Wireor rod 'l is thus electrically insulatedvfrom the engine, and said Wireor rod at or near its 'outer end is electrically connected, by means of\v ire,U,(secil1`igs. l and 3,) with the one termiual of a battery U,"lheother terminal of said vbattery is electrically connected,- by meansof a wire U2, with a contact Us, secured to (see also Fig. 4) butinsulated from, as at Uil, the supporting member of gear -P of themechanism for opening the,ednction-valve,

and adapted to be engaged at the proper time by a revolving contactoperatively. 'connected with the. engine-shaft and-,electricallyconnected with the engine, such, for instance, as a lug or projectionP2, integral with gearP, and thereby complete the electric circuit, thecomplete circuit being lfrom the Y battery through Wire U2 to stationarycontact U3, thence through revolving contact P2,- through the engine toivire or rod S, and thence through insulated Wire or rod 'il and \vire Uto the other terminal of the battery.

. Operatively mounted upon theA engineshai't, preferably next inside ofthehub of flywheel J, is a cam disk or wheel lV, the cani or projectionl uher'cof is adapted to'engagc and actuate lever lf and thereby turlivalvestem L', to which wire or rod S, as already vin-A dicatcd, is'rigidly secured, resulting inthc disconnection of members S andT,.causinga break in the electric circuit in case' the eircuit wascomplete and resulting in thehpro-v duction of an electric spark and inthe ignition of the compressed charge of air and gases Within thecylinder; lty the construction shown members S and 'livill of course b edisconnected uith eachrotation of the engineshaft,fbut the electricvcircuit, it will be observed, is only completed once ina cyclo of theengine, and the arrangement of. parts is such that the circuitis closedimmediately upon thc compression of the charge Within the cylinder andjust before member' S is velectrically disconnected from Vmember T.

The explosion of the mixed airand gases hav- 'ing been effected, leverL, and consequently valve-stem lo' and v"ire or rod S, are turned baclcto their normal position by the action of a coilspriug X, confined uponsaid stem between and secured atopposite ends to slifling collar lf" andsaid lever, said spring bc- -ing put under tension upon the'actuation oflever L5 by cam or cam-Wheel ll".

lVire or rod S; bearing, when the electric circuit is complete, uponinsulated wire-or rod. l, as. already indicated, it follows that memberS will bc electrically disconnected from member 'l with a snap, whichnot only insures the production of an effective spark,

but maintains the rubbingsurfaccs of said contact devices clean andpolished.

Revolving contact I is adapted to become electrically disconnected fromstationaryjnsulated contact Ua immediately after the production oftheelectric spark.

Lateral enlargements a and u? of the casing ofthe engine-cylinder andinclosing jacket at the top are each provided with a vertical threadedbore c",close d `bya correspoudin gl ythreaded plug Z. V-By removingsaid plugs access is v had to the 'valve mechanism, &c., below'. cu-liarconnection of sections 2 and 3 of valvestem L', herei'nbefore described,the adjust--V ment of valve L is readily and conveniently effected. f

What I claim is-jv 1. In a gas-engine, the combination with thecy'flinder, two valve-casings rigid with each other and located the oneWitliin the other, a duct or passage-Way adapted toopcn communicatioubetween the chamber of the outcrvalve casing and theA chamber of thecylinder,

an air-induction port or passage-)ray opening- I would also remark thatby the pep,

into the chamber of the outer-valve casing, a1

gaafinduction port or passage-Way opening,A yinto the chamber of thoinner-valve easing,

of a valve for opening and closing communication between the chamber ofthe outer- Valve casing and chamber of the cylinder and a valve foropening and closing communication between the chambers of the twovalvecasings, the valve of the outer-valve casing having a stemextending downwardly through the inner valve, a nut or rigid member onthe lower end of said valve-stem, a coil-spring mounted on the stembetween said rigid member and the inner valve, and a shoulder on saidvalve-stem adapted to abut the top of the inner valve when the outervalve is closed, substantially as set forth.

2. ln a gas-engine, the combination with the cylinder, two valve-casingsrigid with each other and located the one within the other, a d uct orpassage-way adapted to open communication between the chamber of t-heoutervalve casing andthe chamber of the cylinder, an air-induction portor passage-way opening into the chamber of the outer-valve casing, agas-induction port or passage-way opening into the chamber of theinner-valve casing, of avalve for opening and closing communicationbetween the chamber of the outer-valve casing and chamber of thecylinder, and a valve for opening and closing communication between thechambers of the two valve-casin gs, the outer or upper valve having adownwardlyextending stem suitably connected with the lower or innervalve, a guide for said stem within the chamber of the outer-valvecasing, a shoulder on the stem for supporting said guide, said guidecomprising do wnwardly and outwardly inclined arms connected at theirlower and outer ends by a rim engaging the surrounding wall of thechamber of the valve-casing, substantially as set forth.

3. ln a gas-en gine, the combination with the gas-induction valve, andengine-shaft, of a rotating member operatively mounted on said shaft, aneccentric loose upon the shaft and having an arm pivoted to saidrotating member, a weighted arm rigid with and extending laterally ofthe eccentric, a spring acting in the direction to retain the eccentricin its normal position and suitable mechanism operatively connecting theaforesaid valve with the eccentric and adapted to hold the valve closedor partially closed, the arrangement of parts being such that when thespeed of the engine-shaft becomes too great or abnormal the centrifugalforce developed in the aforesaid weight shall shift the eccentricagainst the action of the aforesaid spring, and cause the aforesaidvalve-holding mechanism to perform its function, substantially as setforth. v

4. In a gas-en gine, the combination with the cylinder, valve-casingrigid with the cylinder,

gas-induction port or passage-way opening into the chamber of saidvalve-casing, said chamber being adapted to communicate with the chamberof the cylinder, and a valve for opening and closing said communication,said valve being adapted to be opened by the suction created by a vacuum`or partial vacuum in the cylinder, and having a stem extendingoutwardlythrough the valve-casing, of the cn gin e-shaft, a fl y-wheeloperatively mounted on said shaft, an eccentric loosely embracing theengine-shaft or hub of the fly-wheel, and having a laterally-extendingarm pivoted to one of the spokes or arms of the fly-wheel, a weightedarm rigid with and extending laterally of the eccentric, a spring actingto retain the eccentric in a concentric position, an eccentric-strapembracing the eccentric and connected with the aforesaid valve-stem insuch a manner, and the arrangement of parts being such, that when thespeed of the engine-shaft becomes abnormal or too great said valve shallpositively be held closed or partially closed until normal speed of theshaft is again attained, substantially as set forth.

5. ln a gas-engine, the combination with an upright cylinder avalve-casing rigid with said cylinder, a gas-induction port orpassageway opening into the chamber of said valvecasing, said chamberbeing adapted to communicate with the chamber of the cylinder, and avalve for opening and closing said communication, said valve beingadapted to be opened by suction created by a vacuum or partial vacuum inthe cylinder, and having a stem extending downwardly through thevalve-casing, of the en gine-shaft, a iiy-wheel operatively mounted onsaid shaft, an eccentric mounted on the hub of said wheel and having alaterally-extending arm pivoted to one of the spokes or arms of theiiy-wheel, a weighted arm rigid with and extending laterally of theeccentric, a spring acting to retain the eccentric in its normalposition, an eccentric-strap embracing the eccentric and connected withthe aforesaid valve-stem in such a manner and the arrangement of partsbeing such that when the speed of the engine-shaft becomes abnormal ortoo great the aforesaid valve shall be positivelyV held closed orpartially closed until normal speed again obtains, substantially as setforth.

6. In a gas-en gine, the combination with the gas-induction valve andvalve-Casin g,the stem of the valve extending outwardly through thevalve-casing, a sliding sleeve or collar on said stem, fixed member onthe stem outside of said collar and a coil-spring suitably mounted onthe stem between said fixed member and sliding member, of theengine-shaft, a flywheel operatively mounted on the shaft, an eccentricloosely mounted on the shaft or iiywheel hub and having alaterally-extending arm pivotally connected with the ily-wheel, aweighted arm rigid with and extending laterally of the eccentric, aspring acting to retain the eccentric in its normal position, aneccentric-strap embracing said eccentric and pivotally connected withthe aforesaid sliding member on the valve-stein, the arrangement ofparts being substantially as and for the purpose set fort-h.

7. In a gas-engine, the gas-induction valve IOO e' cease@ having a'stein composedof three sections,the lower section, at its upper end,extendinginto a corresponding hole in the outer end of the centralsection and said portion of the central section being taperingoutwardly, externally screw-threaded, and engaged by acorrespondingly-threaded nut securely clamping said section onto thelower section, substantially as set forth.

8. In a gas-engine, the combination with the cylinder, two valVe-casingsrigid with the cylinder and located the Vone Within the other, anair-induction port communicating with the chamber of the outer-Valvecasing, a gas-induction port communicating with the chamber of theinner-Valve casing, a Valve for opening and closing communicationbetween J[he chambers of said Valve-casings, a duct or passageway, a,closed at the outer end and adapted to establish open communicationbetween the chamber of the outer-Valve casing and the chamber of thecylinder, and a valve for opening and closing said communication, saidvalves being suitably connected with each other and adapted to be openedby suction created by a Vacuum or partial Vacuum formed Within thecylinder, of an insulated conducting piece or member extending into saidduet and supported by but insulated from the engine, and electricallyconnected or 3c adapted to be electrically connected with the j?" oneterminal of an electric battery, a non-in.- sulated conducting pieceelectrically con-V nected with the engine, extending into the aforesaidduct, terminating, Within said duct,' in a laterally-extending memberadapted to bear upon the inner end of the aforesaid insulatedconducting-piece, and being rigidly secured to the stem of one of theaforesaid Valves, the engine forming part or being 4c adapted to form apart of the electric circuit, suitable means for actuatingsaid'valve-steni to cause the non-insulated conducting-piece to becomeelectrically disconnected from the insulated conducting-piece,engine-shaft and. I. suitable means operatively connected with Y saidshaft for turning said stem in the one!" direction and suitable meansfor turning said stem in the opposite direction, the parts being *Yarranged substantially as and for the purpose 5f set forth. f

In testimony whereof I sign this specification, in the presence of twoWitnesses, this 22d day of December, 1892.

FRED C. OLIN.

Vit-nesses E. TV. BARTHOLOMEW, A. G. BARTHoLoMEW.

